Multi-purpose shoe manufacturing machine



June 26, 1962 v. KREMEL ETAL 3,040,348

MULTI-PURPOSE SHOE MANUFACTURING MACHINE Filed Sept. 20, 1957 2Sheets-Sheet 1 INVENTORS BY MM; w/

June 26, 1962 v. KREMEL ETAL MULTI-PURPOSE SHOE MANUFACTURING MACHINE 2Sheets-Sheet 2 Filed Sept. 20, 1957 w/ my vm m m w f MVM Z 5 3,046,348ruumrirunrosu snob P lANUFA-CTURTNQ MAcnrNn Vil rtor Kremel and JaroslavBenched, Gottwa'idov, Czech The present invention relates to amulti-purpose shoe manufacturing machine for laying the soles andpressing the shoes on a last, and which has a plurality of workingstations arranged circularly in a vertical plane.

. Laying the soles and pressing the shoes on a last previously requiredindividual machines of essentially different construction. Whereaslaying the soles can be accomplished with a singleapair of press membersof relative light weight working at a relatively small working pressureand operated either mechanically or pneumatically, shoe pressing on thelast requires a much higher working pressure and a relatively heaviermachine.

The previously known sole-laying machines have the disadvantage of arelatively short period of duration of the laying pressure which isindispensable for the reliable bonding of the laid on sole with the shoebottom. This resulted in the sole coated with glue not having thenecessary adhesion to the shoe bottom and thereby getting loose, andcausing considerable difficulties during the carrying out of the furtheroperation.

A disadvantage of the existing machine for pressing the shoe on a'lastand having a single pair of pressing members consisted in itsexcessively heavy weight, making difiicult the transport of the machine.However, the chief disadvantage of this machine lies in the fact thatits press bows are susceptible to frequent failures. For this reason,the machine requires considerable maintenance and an extensive supply ofspare parts. Conse quently, the initial costs and upkeep expenses areconsiderable.

The present invention has as its object the elimination of the abovementioned disadvantages in that, on the one hand, both the laying of thesoles and the pressing of the shoes on a last are carried out on asingle machine and, on the other hand, the sole is pressed, during itslaying on the shoe, for a much longer period correspond ing to the timerequired for a complete revolution of the working station, so that theloosening of the sole after it has been laid on the shoe cannot occur.

A further featureof the multipurpose machine according to the presentinvention is its lower weight and therefore the possibility of moreconvenient transport thereoflias well as a substantial reduction in theinitial costs and upkeep expenses in view of the novel design of thepress bows provided on the machine.

The essential feature of the present invention consists in that each ofthe working stations of the machine has a pressing cushion housing onwhich a press bow, having an inverted U-shape, is pivotally arranged,the fully open and hollow part of said how being suitablefor thesuspension therein of a support, while said hollow part of the bowterminates in lever-like ends. I

The above, and other objects, features and advantages of the presentinvention will be apparent in the following detailed description of anillustrative embodiment thereof illustrated in the accompanyingdrawings, wherein FIG. '1 shows e. front view of the machine with theworking stations and circular carrier, the switching off device beingprovided at the front of the machine,

FIG. 2 is a side view of the upper part of a working station with thepress bow shown in section and the shoe in pressing position, and

pi ted rates Patentthe machine in a vertical plane.

FIG. 3 is a detail sectional view along the line A-A of FIG. 2.

Referring now to the drawings, it will be seen that the machineembodying the invention includes a welded drum 1 mounted on a shaft 69which is supported in the machine frame comprising a front wall 4(FIG. 1) and a rear wall 5 (FIG. 2). The drum is provided with lugs 2, 3which support a pressing housing 6, the number of said pressing cushionhousings corresponding to the number of pressing stations which arecircularly arranged in In each pressing cushion housing 6 there ismounted on a pivot 7 a press bow 8 having an inverted U-shaped main partwith lever-like portions 17 and 18 at the opposite ends thereof. Asshown in FIG. 3, the main part of how 8 has an inverted U-shapedcross-section with outwardly directed stiffening flanges along the loweredges.

A support lll is suspended within the part 9 of the bow 8 on pivot Ill.Mounted in a part of this support lil are racks 12, 13 which areadjustable in height in opposite directions by equal amounts throughmovement about a centrally arranged pinion 16.

Pressure members 14 and 15 with cushions 21 are ar ranged at the bottomend of the racks 12 and 13, and are slidable perpendicularly to the axisof the racks. The racks 12, 13 together with the pressure members 14, 15are arranged perpendicularly with respect to the contacted parts of thesurface of the frontal shoepoint and shaft part of shoe B and can beadjusted in the direction of the displacement of the pinion 16. Theangular displacement of the support 10 about the pivot if is adjustableby means of a screw 2% and is counterbalanced by a spring 29.

The end of the support 10 remote from pinion 16 F has a chamfered endpiece 22 on which a rear pressure member 19 is horizontally adjustablymounted (FIG. 2) for acting upon the heel part of the shoe B. In view ofthe fact that the press how -8 is hollow, it can fulfil any requirementsas to mechanical strength and at the same time utilize to the fullestextent the available space for the action of the support 10 togetherwith the racks 12, f3 and pressure members 14, 15, thus permittingreduction of the machines dimensions and weight and providing a moreadvantageous working level and the possibility of clear supervision ofthe working space.

, Each press how 8 is provided with a guide slot 23 slidably receivingthe end of an arm 24 mounted turnably on a pivot 26. A pawl 27 is alsosupported on pivot 26 for co-operation with the leverlike end 17 of thepressbow 8 which has ratchet teeth thereon. The said pawl 27 is urgedinto engagement with the ratchet teeth by a spring not illustrated inthe drawing and is provided with an actuating handle 37 for use in caseof malfunctioning of the machine to permit disengagement of the pawl 27from the ratchet teeth.

A circular carrier 30 (FIGS. 1 and 2) is fixed to front wall 4 bybolts31, and carries a pawl releasing device 32 ina position ahead ofthe vertical position of the working stations (FIG. 1). This deviceconsistsof a cam member 33 with a chamfered' abutment'face 34 at one endand mounted on a pivot 37 at that one end, While the opposite end of thecam member is supported by a spring 36.

In order to rotate the drum '1 with the several working stationsthereon, the machine may further include an electric motor E (FIG. 1)having a pulley 51 secured on its shaft and driving belts 58 which alsorun over a pulley 52 for rotating the latter. The pulley 52 is mountedon a drive shaft 57 and is releasablycoupled to the latter by a clutch50 so that drive shaft 57 is rotated only when clutch Sllis engaged.Rotation of shaft 57 is trans- .3 mitted to drum 1 by means of a worm 54on shaft 57 meshing with a worm gear 55 which is secured to the drum.

The clutch 50 is actuated by a rockable lever 53 which,

In order to operate the latch 47 there is provided a treadle 45 which isrockably mounted at the bottom of the machine frame and which isconnected to a lever 44. A rod 49 extends from lever 44 to a radial armat one end of shaft 46- and a spring 43 is connected to treadle 45 toraise the latter and thereby cause turning of shaft 46 in the directionmoving latch 47 to its operative position. However, when treadle 4-5 isdepressed, latch 47 is moved to its released position. A spring (notshown) is provided for urging shaft 46 axially in the direction forcausing the lever 53 to engage clutch 50, while the engagement of one ofthe stop pins 59 with the latch 47 during rotation of drum 1 causesaxial move ment of shaft 46 in the opposite direction for disengagingthe clutch 5d. The number of stop pins 59 is equal to the numberofworking stations on drum 1 so that, if the treadle 45 is depressed torelease latch 47 and, thereafter, the treadle is freed to permit returnof latch 47 to its operative position, the drum 1 will turn through anangle x which is equal to the angular spacing between the successiveworking stations on the drum.

The sole-laying and shoe-pressing machine according to the presentinvention as above described operates in the following manner:

With the working station S (FIGS. 1 and 2) being in an inactiveposition, i.e. with the pressbow 8 swung outwards about the pivot 7until the upper end of the arm 24 seats against an elastic insert 38 inthe guide slot 23 (FIG. 2), the shoe B is introduced laterally into thepressing cushion housing 6. 'I'hereupon the piston 41 of the cylinder 28is displaced by compressed air or hydraulic fluid so as to effect thepressing-on closing movement of the press how 8 through the medium of adouble-ar-med lever 25. With the cushions 21 on the racks 1:2, 13adjusted in advance to the height corresponding to the respective shoesize and with the front pressure members 14, 15 and rear pressure member19 on the shoe, the ratchet teeth of the end 17 of-bow 8 come intocontact with the pawl 27 and the bow is secured. Then the drum 1 (FIGS.1 and 2) is rotated, as described above, and during such rotation, apart of pawl 27 rides on the chamfered face 34 of the cam member 33, andis thereby automatically swung outwards for disengagement from theratchet teeth on the end 17 of bow 8. Upon such release of pawl 27fromthe end 17 of the press bow 8, the latter is turned upwards about thepivot 7 through the force of a spring 39 connected to the end 18 of bow8, and the double-armed lever 25 is pressed away by the upward turningof how 8. With this opening movement of the press bow 8 the supporttogether with the frontpressure members 14, and the rear pressure member19 are lifted, whereupon the released shoe is removed sidewise andanother shoe can be inserted to repeat the operating cycle.

An outstanding advantage of the machine according to the presentinvention consists in the novel arrangement of the support 10 inside thehollow press bow 8 whereby it is possible to put on the sole within thesmall space provided between the pressure members 14, 15 and 19 and thepressing cushion housing and to press the sole shape of thewelt-stitched shoe which is stretched advantageously on a last. Theapparatus is suitable for 4 all mens and ladies sizes. Thus, theproductivity of the labour and the quality of the shoes produced aresubstantially improved and the weight of the machine as well as itsinitial cost and upkeep expenses are greatly reduced.

We claim:

1. In a sole laying and shoe pressing machine, in combination, a frame;drum means rotatable on said frame about an axis; a plurality ofpressing cushion housings arranged on said drum about said axis; .aplurality of elongated arcuate press bows, each having one longitudinalend portion pivotally secured to a corresponding one of said housingsfor movement of the other longitudinal end portion of said press bowbetween re spective positions thereof adjacent and remote from thecorresponding housings, and a main portion intermediate said endportions, said main portion being spaced from said housing and ofU-shaped cross section so as to define a cavity therein having an openside opposite said housing; a support member pivotally mounted in saidcavity; a plurality of pressure members mounted on said support memberand projecting therefrom toward said housing for clamping a shoe betweensaid pressure members and said housing; fluid-actuated pressure meansmounted on said frame and alignable with said press bows by rotation ofsaid drum means for sequentially moving said press bows from said remotetoward said adjacent 7 positions of said other end portion thereof; stopmeans on each of said press bows and on the corresponding housing forretaining said press bows in the respective adjacent position of saidother end portion thereof; and release means mounted on said frame forsequentially engaging said stop means during rotation of said drum meansfor releasing said press bows from said adjacent position of said otherend portions thereof.

2,. In a sole laying and shoe pressing machine, in

combination, a frame; drum means rotatable on said frame about an axis;a plurality of pressing cushion housings arranged on said drum aboutsaid axis; a plurality of elongated arcuate press bows, each having onelongitudinal end portion pivotally secured to a corresponding one ofsaid housings for movement of the other longitudinal end portion of saidpress bow between respective positions thereof adjacent and remote fromthe corresponding housing, and a main portion intermediate said endportions, said main portion being spaced from said housing and ofU-shaped cross section so as to define a cavity therein having an openside opposite said housing; a support member pivotally mounted in saidcavity; a plurality of pressure members mounted on said support memberand projecting'therefrom toward said housing for clamping a shoe betweensaid pressure members and said housing; stop means on each of said pressbows and on the corresponding housing for retaining said press bows inthe respective adjacent positions of said other end portions thereof;and releasing means mounted on said frame for sequentially engaging saidstop means during rotation of said drum means for releasing said pressbows from said adjacent position of said other end portions thereof.

3. In a sole laying and shoe pressing machine, in combination, a frame;drum means rotatable on said frame about an axis; a plurality ofpressing cushion housings arranged on said drum about said axis; aplurality of elongated arcuate press bows, each having one longitudinalend portion pivotally secured to a corresponding one of said housingsfor movement of the other longitudinal end portion of said press bowbetween respective positions thereof adjacent and remote from thecorresponding housing, and a main portion intermediate said endportions, said main portion being spaced from said housing andofU-shaped cross section so as to define a cavity therein having an openside opposite said housing; a support member pivotally mounted in saidcavity; a plurality of pressure members mounted on said support memberand projecting therefrom toward said housing for clamping a shoe betweensaid pressure members and said housing; first stop means on each of saidpress bows and on the corresponding housing for retaining said pressbows in the respective adjacent position of said other end portionthereof; second stop means on each of said press bows and on thecorresponding housing for limiting movement of said press bow from saidadjacent toward said remote position of said other end portion thereof;and releasing means mounted on said frame for sequentially engaging saidstop means during rotation of said drum means for releasing said pressbows from said adjacent position of said other end portions thereof.

4. In a sole laying .and shoe pressing machine, in combination, a frame;drum means rotatable on said frame about an axis; a plurality ofpressing cushion housings arranged on said drum about said axis; aplurality of-elongated arcuate press bows, each having one longitudinalend portion pivotally secured to a corresponding one of said housingsfor movement of the other longitudinal end portion of said press bowbetween respective positions thereof adjacent and remote from thecorresponding housing, and a main portion intermediate said endportions, said main portion being spaced from said housing and ofU-shaped cross section so as to define a cavity therein having an openside opposite said housing; an elongated support member having two endportions and a central portion pivotally mounted in said cavity; aplurality of pressure members mounted on said support member andprojecting therefrom toward said housing for clamping a shoe betweensaid pressure members and said housing, at least one of said pressuremembers being mounted on each of said end portions of said supportmember; stop means on each of said press bows and on the correspondinghousing for retaining said press bows in the respective adjacentposition of said other end portion thereof; and releasing means mountedon said frame forsequentially engaging said stop means during rotationof said drum means for releasing said press bows from said adjacentposition of said other end portions thereof.

5. In a sole laying and shoe pressing machine, in combination, a frame;drum means rotatable on said frame about an axis; a plurality ofpressing cushion housings arranged on said drum about said axis; aplurality of elongated arcuate press bows, each having one longitudinalend portion pivotally secured to a corresponding one of said housingsfor movement of the other longitudinal end portion of said press bowbetween respective positions thereof adjacent and remote from thecorresponding housing, and a main portion inter-mediate said endportions, said main portion being spaced from said housing and ofU-shaped cross section so as to define a cavity therein having an openside opposite said housing; an elongated support member having two endportions and a central portion pivotally mounted in said cavity; aplurality of pressure members mounted on said support member andprojecting therefrom toward said housing for clamping a shoe betweensaid pressure members and said housing, one of said pressure membersbeing mounted on one of said end portions of said support member and twopressure members being movably mounted on the other end portion; apinion on said support member; rack means on each of said two pressuremembers meshing with said pinion for enforced movement of one of saidtwo pressure members in substantially the opposite direction from thedirection of movement of the other one of said two pressure members;stop means on each of said press bows and on the corresponding housingfor retaining said press bows in the respective adjacent position ofsaid other end portion thereof; and releasing means mounted on saidframe for sequentially engaging said stop means during rotation of saiddrum means for releasing said press bows from said adjacent position ofsaid other end portions thereof.

6. In a sole laying and shoe pressing machine, in combination, a frame;drum means rotatable on said frame about an axis; a plurality ofpressing cushion housings arranged on said drum about said axis; aplurality of elongated arcuate press bows, each having one longitudinalend portion'pivotally secured to a corresponding one of said housingsfor movement of the other longitudinal end portion of said press bowbetween respective positions thereof adjacent and remote from thecorresponding housing, and a main portion intermediate said endportions, said main portion being spaced from said housing and ofU-shaped cross section so as to define a cavity therein having an openside opposite said housing; a support member pivotally mounted in saidcavity; a plurality of pressure members mounted on said support memberand projecting therefrom toward said housing for clamping a shoe betweensaid pressure members and said housing; stop means on each of said pressbows and on the corresponding housing for retaining said press bows inthe respective adjacent position of said other end portion thereof, saidstop means having an abutment face; and releasing cam means mounted onsaid frame for sequentially engaging said abutment faces of said stopmeans during rotation of said drum means for releasing said press bowsfrom said adjacent position of said other end portions thereof.

7. In a sole laying and shoe pressing machine, in combination, a frame;drum means rotatable on said frame about an axis; a plurality ofpressing cushion housings arranged on said drum about said axis; aplurality of elongated arcuate press bows, each having one longitudinalend portion pivotally secured to a corresponding one of said housingsfor movement of the other longitudinal end portion of said press bowbetween respective positions thereof'adjacent and remote from thecorresponding housing, and a main portion intermediate said endportions, said main portion being spacedfrom said housing and ofU-shaped cross section so as to define a cavity therein 7 shoe betweensaid pressure members and said housing;

ratchet-and-pawl means respectively mounted on each of said press bowsand on the corresponding housing for retaining said press bows in therespective adjacent position of said other end portion thereof; andreleasing means mounted on said frame for sequentially engaging saidratchet-and-pawl means during rotation of said drum means for releasingsaid press bows from said ad jacent position of said other end portionsthereof.

8. In a sole laying and shoe pressing machine, in combination, a frame;drum means rotatable on said frame about an axis; a plurality .ofpressing cushion housings arranged on said drum about said axis; aplurality of elongated arcuate press bows, each having one longitudinalend portion pivotally secured to a corresponding one of said housingsfor movement of the other longitudinal end portion of said press bowbetween respective positions thereof adjacent and remote from thecorresponding housing, and a main portion intermediate said endportions, said main portion being spaced from said housing and ofU-shaped cross section so as to define a cavity therein having an openside opposite said housing; an elongated support member having two endportions and a central portionpivotally mounted in said cavity; aplurality of pressure members mounted on said support member andprojecting therefrom toward said housing for clamping a shoe betweensaid pressure members and said housing, one of said pressure membersbeing mounted on one of said end portionsof said support member, and twopressure members being movably mounted on the other end portion; apinion on said support member; rack means on each of said two pressuremembers meshing with said pinion for enforced movement of one of saidtwo pressure members in substantially the opposite direction from thedirection of movement of the other one of said two pressure members;fluid-pressure-actuated pressure means mounted on said frame andalignable With said press bows by rotation of said drum means forsequentially moving said press bows from said remote toward saidadjacent position of said other end portion thereof; ratchet-and-pawlmeans respectively mounted-on each of said press bows and on thecorresponding housing for retaining said press bows in the respectivead- 10 jacent positions of said other end portions thereof; stop meanson each one of said press bows and on the corresponding housing forlimiting movement of said press bow from said adjacent toward saidremote position of said other end portion thereof; an abutment face oneach of said ratchet-and-pawl means; and releasing cam means mounted onsaid frame for sequentially engaging said References Cited in the fileof this patent UNITED STATES PATENTS 2,005,610 Card June 18, 19352,263,133 Hoza Nov. 18, 1941 2,337,093 Finn Dec. 21, 1943 FOREIGNPATENTS 363,907 Great Britain Dec. 31, 1931 488,656 Germany Jan. 7, 1930502,014 Italy Nov. 26, 1954 645,929 Great Britain Nov. 8, 1950 877,960France Sept. 21, 1942 in we

